Dirk-Willem van Gulik (NXP/mbed)
Example self-announcing webserver which controls a servo through a smallHTML userinterface.
services/http/util/base64.cpp@0:a259777c45a3, 2010-08-14 (annotated)
- Committer:
- dirkx
- Date:
- Sat Aug 14 15:56:01 2010 +0000
- Revision:
- 0:a259777c45a3
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| dirkx | 0:a259777c45a3 | 1 | |
| dirkx | 0:a259777c45a3 | 2 | /* |
| dirkx | 0:a259777c45a3 | 3 | Copyright (c) 2010 Donatien Garnier (donatiengar [at] gmail [dot] com) |
| dirkx | 0:a259777c45a3 | 4 | |
| dirkx | 0:a259777c45a3 | 5 | Permission is hereby granted, free of charge, to any person obtaining a copy |
| dirkx | 0:a259777c45a3 | 6 | of this software and associated documentation files (the "Software"), to deal |
| dirkx | 0:a259777c45a3 | 7 | in the Software without restriction, including without limitation the rights |
| dirkx | 0:a259777c45a3 | 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| dirkx | 0:a259777c45a3 | 9 | copies of the Software, and to permit persons to whom the Software is |
| dirkx | 0:a259777c45a3 | 10 | furnished to do so, subject to the following conditions: |
| dirkx | 0:a259777c45a3 | 11 | |
| dirkx | 0:a259777c45a3 | 12 | The above copyright notice and this permission notice shall be included in |
| dirkx | 0:a259777c45a3 | 13 | all copies or substantial portions of the Software. |
| dirkx | 0:a259777c45a3 | 14 | |
| dirkx | 0:a259777c45a3 | 15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| dirkx | 0:a259777c45a3 | 16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| dirkx | 0:a259777c45a3 | 17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| dirkx | 0:a259777c45a3 | 18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| dirkx | 0:a259777c45a3 | 19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| dirkx | 0:a259777c45a3 | 20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| dirkx | 0:a259777c45a3 | 21 | THE SOFTWARE. |
| dirkx | 0:a259777c45a3 | 22 | */ |
| dirkx | 0:a259777c45a3 | 23 | |
| dirkx | 0:a259777c45a3 | 24 | #include "base64.h" |
| dirkx | 0:a259777c45a3 | 25 | //Originaly from Rolf's iputil.c |
| dirkx | 0:a259777c45a3 | 26 | |
| dirkx | 0:a259777c45a3 | 27 | #ifdef __cplusplus |
| dirkx | 0:a259777c45a3 | 28 | extern "C" { |
| dirkx | 0:a259777c45a3 | 29 | #endif |
| dirkx | 0:a259777c45a3 | 30 | |
| dirkx | 0:a259777c45a3 | 31 | #include <string.h> |
| dirkx | 0:a259777c45a3 | 32 | |
| dirkx | 0:a259777c45a3 | 33 | unsigned int base64enc_len(const char *str) { |
| dirkx | 0:a259777c45a3 | 34 | return (((strlen(str)-1)/3)+1)<<2; |
| dirkx | 0:a259777c45a3 | 35 | } |
| dirkx | 0:a259777c45a3 | 36 | |
| dirkx | 0:a259777c45a3 | 37 | void base64enc(const char *input, unsigned int length, char *output) { |
| dirkx | 0:a259777c45a3 | 38 | static const char base64[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; |
| dirkx | 0:a259777c45a3 | 39 | unsigned int c, c1, c2, c3; |
| dirkx | 0:a259777c45a3 | 40 | for(unsigned int i = 0, j = 0; i<length; i+=3,j+=4) { |
| dirkx | 0:a259777c45a3 | 41 | c1 = ((((unsigned char)*((unsigned char *)&input[i])))); |
| dirkx | 0:a259777c45a3 | 42 | c2 = (length>i+1)?((((unsigned char)*((unsigned char *)&input[i+1])))):0; |
| dirkx | 0:a259777c45a3 | 43 | c3 = (length>i+2)?((((unsigned char)*((unsigned char *)&input[i+2])))):0; |
| dirkx | 0:a259777c45a3 | 44 | |
| dirkx | 0:a259777c45a3 | 45 | c = ((c1 & 0xFC) >> 2); |
| dirkx | 0:a259777c45a3 | 46 | output[j+0] = base64[c]; |
| dirkx | 0:a259777c45a3 | 47 | c = ((c1 & 0x03) << 4) | ((c2 & 0xF0) >> 4); |
| dirkx | 0:a259777c45a3 | 48 | output[j+1] = base64[c]; |
| dirkx | 0:a259777c45a3 | 49 | c = ((c2 & 0x0F) << 2) | ((c3 & 0xC0) >> 6); |
| dirkx | 0:a259777c45a3 | 50 | output[j+2] = (length>i+1)?base64[c]:'='; |
| dirkx | 0:a259777c45a3 | 51 | c = (c3 & 0x3F); |
| dirkx | 0:a259777c45a3 | 52 | output[j+3] = (length>i+2)?base64[c]:'='; |
| dirkx | 0:a259777c45a3 | 53 | } |
| dirkx | 0:a259777c45a3 | 54 | output[(((length-1)/3)+1)<<2] = '\0'; |
| dirkx | 0:a259777c45a3 | 55 | } |
| dirkx | 0:a259777c45a3 | 56 | |
| dirkx | 0:a259777c45a3 | 57 | #ifdef __cplusplus |
| dirkx | 0:a259777c45a3 | 58 | } |
| dirkx | 0:a259777c45a3 | 59 | #endif |
| dirkx | 0:a259777c45a3 | 60 |